Lathe attachment for turning-machines



(No Model.) 3 SheetsSheet 1.

J.LINDSTROM & .EJF. BBRGMAN. LATHE ATTACHMENT FOR TURNING MACHINES.

No. 464,757. Patented Dec. 8, 1891.

(No Model.) 3 Sheets-Sheet 2.

J. LINDSTROM-& E. P. BERGMAN. LATHE ATTACHMENT FOR TURNING MAGHINES.

No. 464,757. Patented Dec. 8. 1891.

f J t-ma lillllllllll (No Model.) 3 SheetsSheet 3.

J. LINDSTROM & E. F. BERGMAN. LATHE ATTACHMENT FOR TURNING MACHINES.

No. 464,757. Patented Dec. 8,1891.

K wi vi4 I ':TA a Q i l 2 D d1 WITNESSES:

m W BY NiTEn STATES PATENT OFFICE.

JOHN LINDSTROM AND EDlVARD FFBERGHAN, OF FRANKFORT, NEWV YORK.

LATHE ATTACHMENT FOR TURNING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 464,757, dated December8, 1891.

Application filed February '7, 1891. Serial No. 380,701. (No mocleLl Toall whom it may concern:

Be it known that we, JOHN LINDSTROM and EDWARD F. BERGMAN, of Frankfort,in the county of Herkimer, in the State of New York, have invented newand useful Improvements in Straight or Taper Bolt or Stud Attachments,of which the following, taken in connection with the accompanyingdrawings, is

i a full, clear, and exact description.

Our invention relates to an improved-attachment for lathes and liketurning-machines for forming straight or tapered bolts or rods, and hasforits object the production of a simple and effective device capable ofready attachment at will to such machines, which when once adjustedbrings the bolts or rods to the desired conformation with great rapidthetool-support, a spring between the two supports, and a chamfering-toolmovable toward and away from the article to be cut; and it stillfurthermore consists in the detail construction and arrangement of theparts, all as hereinafter more particularly described, and pointed outin the claims.

In describing this invention reference is had to the accompanyingdrawings, forming a part of this specification, in which like lettersindicate corresponding parts in all the views.

Figures 1 and 2 are respectively side and front elevation of the partsof our invention, the chamfering-tool being shown as out of operativeposition in Fig. 1 and as in operation in Fig. 2. Fig. 3 is'a frontelevation of the parts as illustrated in Fig. 1. Fig. 4 is a horizontalsectional view taken on line 00 m, Fig. 1. Fig. 5 is a horizontalsectional View taken on line y y, Fig. 1; and Fig. 6 is a verticalsectional view taken on' line a 2', Fig. 1.

It is well known that in forming bolts and other similar rods it is verydesirable to form a portion thereof cylindrical and the remainingportion of an accurate and uniform taper.

Our invention is designed to effect this desirable result automatically,accurately, and rapidly without the necessity of the operator frequentlychanging the cutting-tool.

A represents the frame of our invention, which may be of any desirableform, size, and construction suitable for attachment to any style oflathe or screw-cutting machine. The frame illustrated is provided with arear plate A and a hollow rearwardly-extending hub A for attachment tothe tail-stock ofa lathe.

B represents the tool-support consisting of the upwardly-extending headI), in which the cutting-tool O is adj ustabl y held by the plates 1) band the clamping-screw The base 19 of the support is movable in guides ain the top face of the frame and is provided with the depending rib B,which rides in the guidevvay d of the movable plate or adjuster D. Thisadjuster is movable in a guide a in the frame, and the guide (Z of theadjuster tapers gradually from one extremity to the other in a plane atsubstantially right angles to the plane in which the tool-support moveswithin the guides at. As illustrated, this taper is identical with thatadopted as the United States standard for bolts and screws, since ourattachment is particularly useful in manufacturing bolts and screws; butit will. be evident that the guide d may conform to any desired taperfor producing any particular construction of tapered bolt or rod.

Oppositely arranged to the cutting-pointc of the cutting-tool O is thesupport E, h2tVlDgf'-? an upwardly-extending head E, upon which I isadjustably mounted a bearing-face e, having at one end a slot 6',through which passes a clamping-screw e port E is movable in guides aoppositely arranged to the guides a, and is provided with a dependingrib E, which is movable in a guide 01, conforming in taper to that ofthe guide d. Between the two guides, in a seat or slot f formed in theiradjacent sides, is a spring F, which serves to firmly press the ribs Eand l3 upon the respective supports E and B against} the guides at d andprevent any lost movement and consequent chattering of the bolt.

G represents a contact-plate movable at The base 6 of the sup- 7 rightangles to the supportsE and B, with one face 9 in the path of thearticle to be cut, and the other provided with a shank ad justablysecured by a clamp g to a standard 9 rising from the rear end oftheadjuster I). Formed on one edge of the adjuster D are teeth (P, whichare engaged by a spur'gear II, that is mounted in a recess a" in theguide (t on a shaft h. The lower extremity of the shaft 7: is passedthrough a slot in the base 6 of the support E, and is journaled beneathsaid base in the frame A, and its upper extremity is journaled in abracket h, secured at W to the frame A, and is provided with a crank H.It will thus be understood that as the crank H is revolved the gear I'I,engaged with the ad juster D, forces the same forward or backward as maybe desired.

\Vhen desired to out a bolt cylindrically for one inch of its length andtapering the remainder, the crank H is revolved to bring the plate Gwithin one inch of the cuttingtool. As the bolt is fed between thebearing face 6 and the tool (I it is turned cylindrically until its rearend contacts with the contactplate G, which it immediately forcesbackward, and thus automatically forces the adjuster backward.Consequently the remainder of the bolt is turned tapering, since as theadjuster is forced backward by the moving bolt the constant taper of itsguides c? and d permits the natural strain upon the supports 13 and Eand the spring F, which forces the ribs B and E of said supports B and Eagainst the guides 61 d to constantly separate said supports B and E,according as the distance increases between those portions of saidguides d d engaged by the ribs B and E After this bolt is finished anydesired number may be formed in the same manner with absolute certainty,regularity, and with great speed without the necessity of carefulattention on the part of the operator, since the bolt automaticallyvaries, the position of the cutting-tool and the oppositely-arrangedbearing-face without attention from the operator.

Vhen desired to vary the length of the tapered portion, the screwg maybeloosened and the contact-plate set at a different point, or the handleH may actuate the contact-plate to a position nearer to or farther fromthe cutting-tool, thus permitting a great variation in the length oftaper attainable in the use of our machine. Moreover by supplying ourframe with a series of adjusters having their guides (Z and d formed ofa greater or less taper, it is evident that the amount of taper to thebolt or rod formed may begreatly varied, and instead of tapering theguides from the rear end of the adjuster outwardly they may be taperedexactly opposite.

For the purpose of chamfering the end of the bolt before the operationof the knife C, Weprovide the bracket I, hinged at one extremity t' tothe frame A and provided at the other with a hand-engaging lever I, anda movable catch 2' for engaging the frame, as shown in Fig. 2, to retainthe bracket in its operative position.

J represents a bearing-face movable in guides j on the bracket I, andadj ustably secured thereto by the clamping-screw J, and K represents acutting-tool oppositely arranged with a bearing-face J, with'its rearextremity mounted in a guide K and held in position by a clamping-screwit. As bestseen in Figs. 1, 2, and 3, the catch 2" is pivoted at i to ahub t projecting from the free end of the bracket, and is engaged by oneend of a lever 11*, pivoted at if to the handle I, with a springtinterposed between said handle I and lever 43 for normally forcing thecatch to its position illustrated in Fig. 1. \Vhen desired to remove thebracket from operative position, the lever 2'" is rocked, the catch t"swung from operative position,and the bracket rocked against astop-shoulder 1 which may be either formed upon the frame A or thcle-Ver I, being here illustrated as formed on the hub of. the bracket andmovable in a slot a in the frame.

The parts of our invention are very simple in construction andoperation, are durable, strong, and effective in use, and whenoperatively assembled produce a very cheap and desirable attachment thatcan be readily applied to the various styles of lathe and screw cuttingmachinery with but slight additional expense, and that greatly enhancestheir output and decreases the cost of bolts, screws, and rods producedthereby.

The operation of ourinvention will be readily perceived from theforegoing description and upon reference to the drawings, and itisevident that the detail parts may be somewhat varied from that shown anddescribed without departing from the spirit of the invention.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. The herein-described lathe attachment, the same comprising acutting-tool support movable toward and away from the article to be cut,and a movable adjuster for automatically moving said support toward andaway from the article to be cut, substantially as described.

2. The herein-described lathe attachment, the same comprising amovabletool-support, a contact-plate in the path of the article to be cut, andan adjuster D, substantially as described, between said contaet-plateand toolsupport, whereby the position of the latteris changed bymovement of the former, substantially as specified.

The herein-described lathe attachment, the same comprising a frame alongwhich the article to be cut is movable, a tool-support movable on theframe toward the article to be cut, a contact-plate in the path of thearticle to be cut, and an adjuster having one extremity secured to thecontact-plate and the other engaged by said tool-support for varying theposition of the latter as the article to be out moves the contact-plate,substantially as set forth.

4:. The herein-described lathe attachment, the same comprising a framealong which the article to be cut is movable, a tool-support movable onthe frame toward the article to be cut, a contact-plate in the path ofthe article to be cut, an adjuster having one ex: tremity secured to thecontact-plate and the other engaged by said tool-support for varying theposition of the latter as the article to be out moves the contact-plate,and a retractor for retracting the adjuster, substantially as and forthe purpose set forth.

5. Ina lathe attachment, the combination of a tool, an adjuster forbringing the tool toward and away from the article-to be cut, and acontact-plate secured to said adjuster, whereby when the same is movedthe position of the tool is varied, substantially as and for the purposeset forth.

6. In a lathe attachment, the combination of a tool, an adjuster forbringing the tool toward and away from the article to be cut, a bearingsecured to said adjuster, and a contact-plate adjustably mounted in saidhearing, whereby when tlieisame is moved the position of the tool isvaried, substantially as and for the purpose specified.

7. In 'a lathe attachment, the combination of a tool-support, anadjuster for automatically regulating the tool-support in relation tothe article to be cut, a contact-plate adjustably secured upon saidadjuster, and a retractor for returning the adjuster to its normalposition, substantially as and for the purpose specified.

S. In a lathe attachment, the combination of a tool-support having anengaging-rib B, an adjuster D, having a guideway d for receiving saidrib B, and a contact-plate G, carried by said adjuster, substantially asand for the purpose set forth.

9. In a lathe attachment, the combination of a tool-support having anengaging-rib B, an adjuster D, having a tapered guideway for receivingsaid rib B, a contact-plate G, ad-

justably mounted on said adjuster, and a retractor for returning theadjuster to its normal position, substantially as and for the purposespecified.

10. In a lathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be cut, an adjuster forengaging said supports and drawing them toward and away from each other,acontactplate having one extremity secured to said adjuster and theother in the path of the article to be cut for bringing the adjusterinto action, and a retractor for retracting the adjuster, substantiallyas and for the purpose described.

11. In a lathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be out, an adjuster forengaging said supports and drawing them toward and away from each other,a contactplate having one extremity secured to said adjuster and theother in the path of the article to be out for bringing the adjuster y,

into action, a spring interposed between said supports, and a retractorfor retracting the adjuster, substantially as set forth.

12. In a lathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be cut, ribs on thesupports, and a movable plate having Wedgeshaped guides for engagingsaid ribs, substantially as described.

13. In a lathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be cut, ribs on thesupports, a movable plate having wedgeshaped guides for engaging saidribs, and a contact-plate secured at one extremity to said plate,substantially as specified.

14. In a lathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be cut, ribs on the 7supports, a movable plate having wedgeshaped guides for engaging saidribs, and a contact-plate adjustably secured at one ex:

treinity to said plate, substantially as set forth.

15. In alathe attachment, the combination of a tool-support and anoppositely-arranged support for the article to be cut, ribs on thesupports, a movable plate having wedgeshaped guides for engaging saidribs, a contact-plate secured at one extremity to said plate, and aretractor for returning the plate 7 to its normal position,substantially as and plate, a retractor for returning the plate to itsnormal position, and a spring between the,

said supports, substantially as specified.

17. In alathe attachment, the combination of the frame having guides, atool-support,

and a support for the article to be cut movable in said guides, a platemovable at right angles with the supports, wedge-shaped guides on theplate for engaging said supports, a

contact-plate secured to said -movable plate, teeth formed in themovable plate, and a gear for engaging said teeth, substantially asdescribed. I

18. In a lathe attachment, the combination of the frame having guides, atool-support, and a support for the article to be cut mov able in saidguides, a plate movable at right.

angles with the supports, wedge-shaped guides onthe plate-for engagingsaid supports, a contact-plate secured to said movable plate, teeth"formed in the movableplate, arevoluble spindle mounted on the frame, arecess in oneof the supports toreceive said spindle, and a,

gear on the spindle for engaging the teeth on the movable support,substantially as specified.

19. The combination, with a frame, of a hinged bracket, a cutting-toolon the bracket, and a movable catch on the bracket for retaining it inoperative position, substantially as set forth.

20. The combination, with a frame, of a hinged bracket, a cutting-toolon the bracket, a movable catch on the bracket for retaining it inoperative position, a spring for forcing said catch into position, and alever for rocking the catch against the action of thespring,substantially as specified.

21. The combination, with a tool-support and an oppositely-arrangedsupport for the article to be cut, of an adjuster for varying theposition of the tool-support, a contactplate in the path of the articleto be cut for bringing the adjuster into operation, a hinged bracket,and a second tool secured to said bracket, substantially as set forth.

The combination, with a frame, a toolsupport, and an oppositely-arrangedsupport for the article to be cut mounted on said frame, an adjuster forvarying the position of said supports, a contact-plate for bringing theadjuster into operation, a hinged bracket, a second tool on the bracket,and a catch on the bracket for retaining it in operative position,substantially as specified.

23. In combination with a frame, a pair of oppositely-arranged supportsmovable toward and away from each other on the frame, an adjustablebearing-face on one of the supports, an adjustable tool on the other ofsaid supports, an adjust-er for engaging the supports and bringing saidbearing-face and knife toward and away from each other, and acontact-plate secured to said adjuster for bringing it into operation,substantially as set forth.

24. In combination with a frame, a pair of oppositely-arranged supportsmovable toward and away from each other on the frame, an adjustablebearing-face on one of the supports, an adjustable tool on the other ofsaid supports, an adjuster for engaging the supports and bringing saidbearing-face and knife toward and away from each other, a contact-platesecured to said adjuster for bringing it into operation, and a retractorfor returning the adjuster to its normal position, substantially asspecified.

In testimony whereof we have hereunto signed our names, in the presenceof two attesting witnesses, at Syracuse, in the county of Onondaga, inthe State of New York, this 7th day of October, 1890.

JOHN LINDSTROM. EDWARD F. BERGMAN. \Vitnesses:

CLARK H. NORTON,

II. E. CHASE.

